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US 5,262,010 AGranted
Dewatering device with adjustable force elements for the web-forming section of a papermaking machine
AssigneeSulzer-Escher Wyss GmbH
InventorsAlfred Bubik, Otto Hildebrand
Life of this patent
Estimating the term…
Abstract
A dewatering device for the web-forming or wet section of a papermaking machine comprises foils arranged transverse to a forming wire, that is to say, extend in the cross-machine direction. Force or powering elements act upon the foils so as to exert a force or pressure upon the forming wire, and thus, bring about dewatering and sheet formation of a layer of fiber stock suspension reposing upon the forming wire. The force elements are constructed and positioned such that additional moments are generated which counteract tilting moments produced by the frictional force present between the foils and the forming wire. In certain arrangements, the force elements also can be interconnected with one another.
Claims19
A dewatering device for the web-forming section of a papermaking machine, comprising:
- a forming wire movable in a predetermined direction of travel;
- a forming wire movable in a predetermined direction of travel;
- a plurality of foils cooperating with the forming wire and disposed transverse to the predetermined direction of travel of the forming wire;
- force elements provided for the foils for exerting, by means of the foils, a predetermined force upon the forming wire for the dewatering and formation of a paper web formed of fiber stock suspension which is located upon the forming wire, the force elements comprising adjustable force elements successively arranged in the predetermined direction of travel of the forming wire for producing the moments which counteracts the tilting moments;
- the force elements being constructed and positioned such that the force elements produce additional moments counteracting tilting moments exerted by frictional forces present between the foils and the forming wire, including means for connecting together at least one plurality of only two, three or four of the plurality of foils into a foil group;
- support members extending transverse to the predetermined direction of travel of the forming wire;
- a predetermined number of the plurality of foils being arranged in succession in the predetermined direction of travel of the forming wire and secured at respective individual ones of the support members and assembled together to form said foil group;
- guide members, each guide member structured for displaceably guiding a respective one of the support members in the direction of the forming wire;
- an abutment element mounted on at least one of the support members and cooperating with at least one of the guide members and movable in the direction of the forming wire, said abutment element being structured and arranged for taking up forces acting in the predetermined direction of travel of the forming wire;
- the means for connecting together at least one plurality of only two, three or four of the plurality of foils into a foil group comprising coupling elements for mechanically interconnecting the support members with one another;
- and
- said support members and said coupling elements being constructed such that there is provided a predetermined amount of free space for the throughflow of water passing through the forming wire.
9 more elements
The dewatering device for the web-forming section of a papermaking machine according to claim i, wherein:
- the force element of an associated foil comprises at least two force-generating sources provided for each associated foil;
- one of said at least two force-generating sources producing a force which fails to extend directly towards the forming wire;
- and
- means for shifting said one of said at least two force-generating sources in the direction of the forming wire.
1 more element
A dewatering device for the web-forming section of a papermaking machine, comprising:
- a forming wire movable in a predetermined direction of travel;
- a plurality of foils cooperating with the forming wire and disposed transverse to the predetermined direction of travel of the forming wire;
- force means provided for the foils for exerting, by means of the foils, a predetermined force upon the forming wire for the dewatering and formation of a paper web formed of fiber stock suspension which is located upon the forming wire;
- the plurality of foils contacting the forming wire, during operation of the dewatering device, to produce frictional forces between the plurality of foils and the forming wire which exert tilting moments upon the plurality of foils;
- the force means, together with means for connecting together at least one plurality of only two, three or four of the plurality of foils into a foil group, producing additional moments counteracting the tilting moments exerted by the frictional forces present between the plurality of foils and the forming wire;
- support members extending transverse to the predetermined direction of travel of the forming wire;
- said means for connecting together at least one plurality of only two, three or four of the plurality of foils into a foil group comprising coupling elements for mechanically interconnecting said plurality of only two, three or four of the plurality of foils in succession in the predetermined direction of travel of the forming wire and for assembling respective individual ones of the support members together to form said foil group;
- guide members, each guide member structured for displaceably guiding a respective one of the support members in the direction of the forming wire;
- means mounted in cooperation with at least one of the support members and with at least one of the guide members for taking up forces acting in the predetermined direction of travel of the forming wire;
- and
- said support members and said coupling elements being constructed such that there is provided a predetermined amount of free space for the throughflow of water passing through the forming wire.
8 more elements
Dependencies are inferred from the claim text.